Free Smartphone mock-up templates are an easy and completely hassle-free way that can be used to create the user interface designs as well as the web designs. Look for the exceptionally good and spiffy designs available over the PSD resources to create a responsive design for your client.
These mock-up templates can be used for phones like Samsung galaxy s6, HTC, Motorola, Lumia and much more. Download the various templates available and edit them with the digital software. Adding required colours and customised design would be the only thing that you need to work on as you use the mock-up templates.